Improvement in plows



J. PINKHAM.

Plow Coulter. No. 111,244. PatentedJa-n. 24,` 1871.

W1i tnevses Irwelfltor UNITED STATES PATENT OFFICE.

JOSEPH PINKHAM, OF NEW MARKET, NEW HAMPSHIRE.

IMPROVEMENT IN PLows.

Specification forming part of Letters Patent No. 111,244, dated January 24, 1871.

To all whom 'it may concern;

Be it known that I, JOSEPH PINKHAM, of New Market, county of Rockin gham, and State of New Hampshire, have invented certain new and useful Improvements in Plows; and I do hereby declare that t-he following is a full, clear, and exact description of the same, reference being had to the annexed drawings, and to the letters ot' reference marked thereon, making part of this specification, in which- Figure l is a side view of the plow, partly iu section. Fig. 2 is a top view, partly in seetion. FigzB is a pla-n view of details. Fig. 4, views in detail of the colter; Fig. 5, part of the stock or beam; Fig. G, elevation ofa colter.

My invention relates, iirst, to the manner of pivoting the beam in the lower part of the share, and the arrangement for the proper adiustment of it, both for the vertical and the lateral movements; secondly, to the method of fastening the colter to the front edge of the share. Y

In the drawings, Ais the bea m or stoek,which is pivoted to the share at a.

A/ is the adjusting-frame through which the beam passes, and in the sides of which are screw-threaded holes for the screw-bolts a a" a a." to Work in.

B is a colter, which has a yoke, b,made to tit snugly the projecting part of the share at l), being clamped by athrough-bolt, b, or by a clamp-bar and nuts, b3, as shown in the modication of Fig. 4.

B is the mold of B for turning the stubble or grass or weeds, as the case may require.

C is a colter depending from the beam A at an advancedposition, and is fixed in a cleat upon the side of the beam, or it may be set in a mortise in the bod y of the beam and fastened by aset-screw or any other suitable device. This colter may have either a left or right turn mold, as shown in Figs. 2 and5 at C o G c.

a is the pivot by which the beam is fastened to the share.

a a. a a are four set-screws for adj ustin g the beam to give it the proper depth in the ground when in use.

,colter very securely in its exact position.

o is the mold-piece of the additional colter. o is the shank by which it is to be attached to the beam, either in a cleat, o, or in a mortise in the beam itself.

The explanation of the letters will readily show the peculiar construction of the several parts of the improvements claimed, and which may be adapted to any form of plowshare.

The advantages of these improvements are manifest. The beam admits ofthe very nicest adjustment vertically as well as laterally, and may readily be adapted to any soil, and the laterally-adjusting screws will afford equal facilities to regulate the action of the plow to or from the landside.

The method of fastening the colter over the sharepoint admits of easy and rapid removal. The forward colter can be used separately or in connection with the other.

Having described my invention, what I claim as new therein, and desire to secure by Letters Patent of the United States, is-

1. The frameV A', with adjusting-'screws a" ct a. a", combined with the beam A, pivoted at a, substantially as and for the purpose described.

2. The colter B, with its projecting lip b4, inserted into the slot or mortise in the point of the share, and theyoke b, fastened to the sta ndard of the plow, either by the bolt b or the bolts and bar b3, substantially as and for the purpose described.

JOSEPH PINKHAM. Witnesses:

THOMAS O. GoNNoLLY,

WM. R. SrNeLEToN. 

